2,773 research outputs found
Structural stochastic stability of a simple auto-oscillatory climatic feedback system.
No full textBased on a more detailed model developed previously, governing possible feedbacks between sea ice extent (eta), deep-ocean temperature (theta), and atmospheric carbon dioxide, we have constructed a simple, deterministic, dynamical system for eta and theta that yields a stable limit cycle as a solution. To make the system more realistic we add random (white noise) forcing and explore the new response as a function of the amplitude of this stochastic forcing. -from Author
Laser Magnetic Resonance Measurement Of The 3p1-3p0 Fine-structure Separation Of P+
No full textThe far-infrared laser magnetic resonance spectrum associated with the J = 1 ← 0 fine-structure transition of 31P+ in its ground 3P state has been recorded. This is the first laboratory observation of this magnetic dipole transition, and its frequency has been measured 2 orders of magnitude more accurately than the previous, indirect determination from optical spectroscopy. The frequency is ΔE10 = 4944433.0 ± 1.7 MHz. A small nuclear hyperfine splitting was also observed for the J = 1 level.4642 PART IIL203L206Brown, J.M., Evenson, K.M., Zink, L.R., (1993) Phys. Rev. A, 48, p. 3761(1994) ApJ, 431, pp. L147Brown, J.M., Varberg, T.D., Evenson, K.M., Zink, L.R., (1994) ApJ, 428, pp. L37Brown, J.M., Zink, L.R., Evenson, K.M., (1994) ApJ, 423, pp. L151Cooksy, A.L., Hovde, D.C., Saykally, R.J., (1986) J. Chem. Phys., 84, p. 6101Guélin, M., Cernicharo, J., Paubert, G., Turner, B.E., (1990) A&A, 230, pp. L9Haas, M.R., Hollenbach, D.J., Erickson, E.F., (1991) ApJ, 374, p. 555Lugten, J.B., Genzel, R., Crawford, J.K., Townes, C.H., (1986) ApJ, 306, p. 691Martin, W.C., Zalubas, R., Musgrove, A., (1985) J. Phys. Chem. Ref. Data, 14, p. 751Moore, C.E., (1949) Atomic Energy Levels as Derived from the Analyses of Optical Spectra, 1. , (Circ. Natl. Bur. Stand. 467) (Washington: NBS)Svendenius, N., Magnusson, C.E., Zetterberg, P.O., (1983) Phys. Scr., 27, p. 339Tielens, A.G.G.M., Hollenbach, D.J., (1983) ApJ, 291, p. 722Turner, B.E., Bally, J., (1987) ApJ, 321, pp. L75Varberg, T.D., Brown, J.M., Evenson, K.M., (1994) J. Chem. Phys., 100, p. 2487Vasconcellos, E.C.C., Zerbetto, S.C., Holecek, J.C., Evenson, K.M., (1995) Opt. Lett., 20, p. 1Veseth, L., (1980) Phys. Rev. A, 22, p. 803Wright, E.L., (1991) ApJ, 381, p. 200Ziurys, L.M., (1987) ApJ, 321, pp. L8
'Nothing to be afraid of': Reading and Translating Brian Evenson
No full textInternational audienceThis two-day event focused on the later work of American novelist and short story writer Brian Evenson, to be set in perspective through comparisons with his earlier work.Brian Evenson is a prolific author who has already published more than 14 short story collections, 6 novellas and 8 novels. In 2023, Quidam and Rivages respectively published two of his works in French, L’Antre (originally The Warren [2016], translated by Stéphane Vanderhaeghe) and Immobilité (originally Immobility [2012], translated by Jonathan Baillehache).His œuvre has been the object of three doctoral dissertations, one of which, by Nawelle Lechevalier-Bekadar (HCTI, Université de Lorient), was published under the title Brian Evenson : une esthétique du malaise (Sorbonne Université Presses, 2024). The publication, in April 2024, of Brian Evenson’s latest collection of short stories, Song for the Unraveling of the World (Coffee House Press, 2019), in its French version, Comptine pour la dissolution du monde (Rivages, translated by Jonathan Baillehache), as well as of a new collection, also with Coffee House, Good Night, Sleep Tight, in September 2024 , is a fitting conjunction for an event dedicated to the author’s work and its singular aesthetics. A new longer work of fiction is scheduled for release in a French translation prior to the original English version on May, 7 2025. As a writer, professor and translator—of French prose and poetry—Brian Evenson experiments with structure and language to explore the potentialities of liminal spaces, especially the intersection of genre fiction and literary fiction. Through narratives characterized by a detached tone, recurring motifs and metafictional practices, as well as by a rich literary, philosophical and religious intertext, Evenson explores the limits of man’s encounter with the various extremes offered by contemporary society
Donald Jennings [left] and Kenneth Evenson with the frequency measurement apparatus
No full textKenneth Evenson, Donald Jennings, and Russell Peterson successfully accomplished the highest direct frequency measurement (over 520 terahertz) made at that time (1970s) in a joint project with the Canadian National Research Council. See NBS Special Publication 367, p.22. This image is part of the Evenson Highest Frequency collection. National Bureau of Standards (NBS) researchers Kenneth Evenson, Donald Jennings and Russell Petersen successfully accomplished the highest direct frequency measurement ever made (over 520 terahertz) in a joint project with the Canadian National Research Council in 1972
Donald Jennings [left] and Kenneth Evenson with the frequency measurement apparatus
No full textKenneth Evenson, Donald Jennings, and Russell Peterson successfully accomplished the highest direct frequency measurement (over 520 terahertz) made at that time (1970s) in a joint project with the Canadian National Research Council. See NBS Special Publication 367, p.22. This image is part of the Evenson Highest Frequency collection. National Bureau of Standards (NBS) researchers Kenneth Evenson, Donald Jennings and Russell Petersen successfully accomplished the highest direct frequency measurement ever made (over 520 terahertz) in a joint project with the Canadian National Research Council in 1972
Long-Run Structural and Productivity Change in U.S. Agriculture: Effects of Prices and Policies
No full textLong-Run Structural and Productivity Change in U.S. Agriculture: Effects of Prices and Policies by Wallace E. Huffman and Robert E. Evenson The paper presents (1) a conceptual framework for structural change when farms may be multiproduct or specialized and (2) an econometrics examination of causes of structural and total factor productivity (TFP) change for U.S. agriculture. Farm size, farm specialization, and part-time farming are the structural dimension emphasized, and they become potential channels to TFP change. Using state aggregate data starting in 1950, we conclude that input prices, public and private research, public extension, and government commodity programs have directly and indirectly caused change in U.S. farm structure and TFP. Our results suggest that changes in farm size, however, have been dominated by input price changes rather than by technology or government programs.farm structure, productivity, farm size, farm specialization, part-time farming, research, technical change, agriculture
On assassine Paris : "Paris : a Century of Change". 1878-1978, par Norma Evenson
No full textThe assassination of Paris. (Richard Cobb, p.97-113)
In his account of Norma Evenson's book : Paris : a century of change. 1878-1978, Richard Cobb points to the upheavals wrought by the great renovation works in the social make-up and relationships which prevailed in the very varied Paris quarters.
The arguments in favour of grandiose architectural and urban transformation plans minimize, dismiss, even deny the magnitude of the upheavals they cause in the human geography of Paris.A propos du compte rendu qu'il fait de l'ouvrage de Norma Evenson : Un siècle de changement architectural et urbanistique à Paris. 1878-1978, Richard Cobb évoque les bouleversements que les grands travaux d'aménagement ont provoqués dans la composition sociale de quartiers de Paris extrêmement variés.
Les discours qui soutiennent les projets grandioses de transformation architecturale et urbanistique minimisent, ignorent, voire même dénient l'importance des bouleversements qu'ils provoquent dans la géographie humaine de Paris.Asesinan a Paris. (Richard Cobb, p.97-113)
Richard Cobb evoca, con motivo del comentario del libro de Norma Evenson : Un siglo de cambios arquitectónicos y Urbanísticos en París. 1878-1978, las conmociones que engendraron las grandes obras de urbanismo, en la composición social y en las relaciones sociales dentro de los barrios de París, tan diferentes entre si.
Los discursos que sostienen a los proyectos grandiosos de transformaciones arquitectónicas y urbanísticas, minimizan, ignoran, e incluso niegan la importancia de esas conmociones, sufridas por la geografía humana de París.Cobb Richard, Leblond Doris. On assassine Paris : "Paris : a Century of Change". 1878-1978, par Norma Evenson. In: Les Annales de la recherche urbaine, N°7, 1980. pp. 97-113
Rotational And Hyperfine Constants Of Vibrationally Excited Nh (a1Δ; V = 1)
No full text[No abstract available]1221242245Leopold, Evenson, Brown, (1986) J. Chem. Phys., 85, pp. 324-330Peterson, Scalabrin, Evenson, Frequencies of cw FIR laser lines from optically pumped CH2F2 (1980) International Journal of Infrared and Millimeter Waves, 1, pp. 111-115Hall, Adams, Kasper, Curl, Tittel, Color-center laser kinetic spectroscopy: observation of the a^1Δ NH vibrational fundamental (1985) Journal of the Optical Society of America B, 2, pp. 781-784Gordy, Cook, (1970) Microwave Molecular Spectra, p. 518. , Wiley-Interscience, New Yor
The Diffusion of Bt Cotton and the Economic Impact on Producers
No full textThe objective is to present the economic impact of producers adopting Bt cotton and the rapid diffusion on the main producing countries: USA, China and India. The existing literature about this type of transgenic crop has been revised and the results of different research are presented. Bt cotton varieties have been quickly adopted by the countries in this study. Data show that this technology helps reduce production losses and significantly decrease the use of pesticides, thus saving their cost and the associated labour cost. But the total cost reduction is weak due to the high prices of the seeds incorporating this technology.Innovation diffusion, Bt cotton, Crop Production/Industries,
LASER MAGNETIC RESONANCE SPECTROSCOPY AND HYPERFINE STRUCTURE IN THE STATE OF
No full text Saykally, R. J. and Evenson, K. M., ``The Far-Infrared Laser Magnetic Resonance Spectrum of CF,'' 34th Symposium of Molecular Spectroscopy, Columbus, OH; June 1979; Paper TF-4. Supported by NSF Grant Author Institution:In 1979 Saykally and described laser magnetic resonance spectra of five transitions of CF in the ground state. Here we report the analysis of both the and spectra of the transition. These spectra were well-resolved and using nonlinear least squares analysis the following constants were determined: (MHz) \begin{eqnarray*} B_{0} &=& 42 192.74(38) \\ h &=& 665(11) \\ b &=& 240(30) \\ d &=& 586(420) \\ P_{0} &=& 367(28) \end{eqnarray*} From the hyperfine constants, the appropriate integrals over the unpaired electron distribution were determined. From there, a qualitative interpretation of the electronic structure of the ground state of CF can be obtained
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